Ventilator for vehicles



s. w. FUNK 1,971,556

VENTILATOR FOR VEHICLES Aug. 28, 1934.

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Patented Aug. 28, 1934 My invention relates tora ventilator particularly adapted, for vehicles or to .be placed in buildings in a position opening towards the prevailingvvind, or the ventilators may be placed on all sides of i the building to function in accordance with the wind which is blowing the hardest and to be regulated in accordance with the velocity of the Wind.

Another object and feature of my invention is the employment of a ventilator which automatically closes or opens, depending upon the velocity of the wind through the ventilator. Thus when the ventilator is mounted on a moving vehicle, the higher the velocity of the air flow past the vehicle this air speed relative to the vehicle is lessened the ventilator is opened to a greater extent. Thus a further object of my invention is an automatic regulation of the quantity of air passing through the ventilator. This is accomplished by varying the cross sectional area of the ventilator opening in accordance with the wind velocity or wind pressure.

Another object and feature of my invention in 1 connection with the ventilator is the employment of one or more pivoted or moving louvers. Each louver is controlled by a spring and the spring may be adjusted to hold the louver in a definite position when there is no air flowing through I the ventilator, then as the wind force increases on the opening of the ventilator the louver automatically moves toward a closing position but this is resisted by the spring. Therefore, as the wind force decreases the spring automatically opens the I louver to its full extent. In connection with the action of the spring, stop devices may be used to limit the movement of the louver.

My invention is illustrated in connection with the accompanying drawing, in which:

Fig. 1 may be considered as an end elevation of part of the vehicle.

Fig. 2 is a longitudinal section on the line 2--2 of Figure l in the direction of the arrows.

Fig. 3 is a vertical transverse section on the line 3-3 of Figure 2 in the direction of the arrows.

In the drawing a ventilating tube or passage 11 is employed. This is shown as being rectangular in cross section having a floor section 12, a top 13, and two sides 14. The outside is illustrated as having a flange 15 extending partly over the outside end wall 16 of part of a vehicle designated as 17. This end wall has an opening 18 0f the proper shape to accommodate the tubular ventilating tube or passage. In the illustrations a roof causes a greater closing of the ventilator and as structure 19 is illustrated as having roof ;supports 20.

A .lo uver plate 21-has hinges 22. connected thereto and to e .a oo of t a passa e the louver having a free moving fit between the sides 60 14. A tension spring 23 is secured at 24 to the under side of the louver and at 25 to the floor 12. An adjustable stop bolt 26 extends through the floor, which preferably has a threaded section. This thread may be on a bushing 27 fitted in the Q6 floor, the bolt being adjustable by a nut and lock nut 28. The bolt passes through a perforation in the louver and has an enlarged head 29. A stop stud 30 extends through a perforation in the floor and is held in place by a nut and a lock nut 31.

The manner of operation and functioning of my ventilator which employs the automatically actuating louver is substantially as follows. It is presumed that the vehicle is either moving in the direction or" the arrow 32 of Figure 2 or else on a stationary vehicle that the air is blowing in a reverse direction such as that of the arrow 33. If the vehicle is moving in the direction of the arrow 32, the Wind would blow in the direction 33 unless the velocity of Wind were greater than that of the speed of the vehicle. The wind pressure endeavoring to pass through the opening of the tube or passage 11 presses underneath the pivoted louver 21 and tends to tilt this upwardly. The degree of motion is limited by the head 29 on the screw 27. The greater the wind pressure, due to a wind of higher velocity, causes the louver to move upwardly thus restricting the space between the free end 34 of the louver and the top 13 of the air passage. This action naturally restricts the flow of air when the air is blowing with a considerable velocity on the open end of the air passage but as the velocity of the air decreases the spring retracts the louver, thus giving a wider opening for the flow of air.

Various changes may be made in the details of construction without departing from the spirit or scope of the invention as defined by the appended claims.

I claim:

1. A ventilator having a. structure forming an air passage, a louver pivotally mounted adjacent the inner portion of the passage, a stop means to limit the movement of the free end of the 1 louver towards the side on which it is pivoted, a spring to retract the louver to contact with said stop means, the free end of the louver extending towards the intake end of the passage and said free end being movable towards the side opposite to that to which the louver is pivoted by the flow of air through the passage.

2. A ventilator as claimed in claim 1, an adjusting bolt operatively connected to the louver and to the side of the passage to which said louver is pivoted for adjustably limiting the free end of the louver towards the side opposite that to which it is pivoted.

3. A ventilator having a rectangular structure with a floor, a top and two sides and open at the opposite ends forming an air passage, a fiat sheet forming a louver pivoted to the floor adjacent the outlet end of the passage, the free end extending upwardly towards the inlet end, a spring connected between the sheet and the floor and adapted to retract the sheet towards the floor, the flow of air through the inlet of the passage being adapted to raise the sheet towards the top of said passage and thereby obstructing the passage.

4. A ventilator as claimed in claim 3, the louver having an opening, a bolt adjustably mounted in the floor and extending through said opening, the top of the bolt having a head to limit the upward movement of the sheet louver.

5. A ventilator having a rectangular structure with a floor, a top, and two sides and open at opposite ends forming an air passage, a flat sheet forming a louver pivoted to the floor adjacent the outlet end of the passage, the free end extending upwardly toward the inlet end and toward the top, said louver having an opening, a bolt adjustably mounted in the floor and extending through said opening, the top of the bolt having a head to limit the upward movement of the louver, and means attached to the floor and the louver to retract the louver toward the floor.

6. A ventilator having a structure forming a longitudinal passage open at opposite ends for the flow of air, a louver formed of a plate pivoted to one portion of the passage structure adjacent its outlet end, a bolt secured to the passage structure and having a sliding connection with the louver, said bolt having a head to limit the movement of the louver under action of the inflowing air, and a spring attached to the louver and one side of the structure to retract the louver toward the side to which it is pivoted.

S. W. FUNK. 

